Gawd Man,
Don't Do It.
Lightbleed ( They all have it on the bottom right corner while watching a movie.. some have it at various spots all around the screen..) there are some on XDA that are on their 8th Nexus-10 because of the Lightbleed issue.., Google 4.2.1 makes your Nexus-10 run WORSE than 4.1.1 ( Random Reboots, studders using Chorme studders in NFS Most Wanted ) Been use to eating well with the ipad's 275,000 Tablet Optimized Apps? you will just have the Developer's "Crumbs" here.. only 50-100 tablet optimized apps for Android.. Developers develope for iPad.. So I hope you don't like Tablet Optimized App variety on your plate.. or you can live with Blown Up ( 2x ) Phone Apps running on your Nexus-10... If so, you are good to go. Android has over 700,000 of them waiting for you to download and run on your Nexus-10..
Do yourself a big favor..
Walk into an Apple Store and let them fit you with a Retina Display State of the Art iPad 4..
You'll be glad you did.